The cold air intake I had bought had extremely small piping ( smaller than my celica tb). I decided to go with some 3" intake piping and now my car runs like crap. I half expected this because of the air speed difference through the maf. Is there any way around this?
The cold air intake I had bought had extremely small piping ( smaller than my celica tb). I decided to go with some 3" intake piping and now my car runs like crap. I half expected this because of the air speed difference through the maf. Is there any way around this?
if you want to run the 3" intake you need a standalone. my intake pipe is the same size as my tb so im guessing its 2.5-2.75" and runs good.
You should be able to run whatever piping you want...the map is after the tb and a map sensor doesn't rely on air speed, it relies on absolute pressure. i adapted to 2.5" right in front of the maf to increase air speed. It's better, but it still bogs at wot and is really jumpy...guess i need to go down to 2.25"? I can feel the power increase at 3/4 throttle since that's all it will let me get though haha. I just don't want it to be smaller than my throttle body.
I've almost figured out how to make this work without different management I'll be sure to post a video of how this thing sounds and what not when I'm finished.
I've almost figured out how to make this work without different management I'll be sure to post a video of how this thing sounds and what not when I'm finished.
waiting paitently but i got a little bit bored and made this (decided to pull the intake off for S&G's.) Your car Backfire a lot?
haha nice vid . Yeah, definitely pops a lot but I got the car to run smooth now, just can't quite get the pedal to the floor. Faster than it was before (w/o wot ) Now I just need a little fine tuning in my design.
one thing i've noted from the 9th gen guys is they cant run 3 inch intakes without a standalone. hell i dont even think i could MAP/MAF aside.
map you can run as big as possible. no problems. maf has the problem because the maf sensors are calibrated to the maf housing inner diameter.
Quote:
Originally Posted by Quick2000
You should be able to run whatever piping you want...the map is after the tb and a map sensor doesn't rely on air speed, it relies on absolute pressure. i adapted to 2.5" right in front of the maf to increase air speed. It's better, but it still bogs at wot and is really jumpy...guess i need to go down to 2.25"? I can feel the power increase at 3/4 throttle since that's all it will let me get though haha. I just don't want it to be smaller than my throttle body.
Quote:
Originally Posted by Quick2000
I've almost figured out how to make this work without different management I'll be sure to post a video of how this thing sounds and what not when I'm finished.
try this, have the maf mounted as close to the tb as possiable with the piping around 2.5in everything in front of the maf have it 3in. just make it taper to increase velocity before entering the manifold.
the only other way to truely run a 3in without a standalone on a maf'd toyota is some form of signal modification to the maf sensor signal wire. the best is by using a piggy back device like the power enterprise camcon (which also does vvti) or the more crude apexi safc/2/neo.
or get creative with a potentiometer, but i wouldnt do that.
Quote:
Originally Posted by wikipedia.com
Hot wire sensor (MAF)
A hot wire mass airflow sensor determines the mass of air flowing into the engine’s air intake system. The theory of operation of the hot wire mass airflow sensor is similar to that of the hot wire anemometer (which determines air velocity). The General Motors division (GM) was the first car company to use the hot wire sensor.[citation needed] This is achieved by heating a wire with an electric current that is suspended in the engine’s air stream, like a toaster wire. The wire's electrical resistance increases as the wire’s temperature increases, which limits electrical current flowing through the circuit. When air flows past the wire, the wire cools, decreasing its resistance, which in turn allows more current to flow through the circuit. As more current flows, the wire’s temperature increases until the resistance reaches equilibrium again. The amount of current required to maintain the wire’s temperature is directly proportional to the mass of air flowing past the wire. The integrated electronic circuit converts the measurement of current into a voltage signal which is sent to the ECU.
Quote:
Originally Posted by Bdub215
waiting paitently but i got a little bit bored and made this (decided to pull the intake off for S&G's.) Your car Backfire a lot? http://www.youtube.com/watch?v=fBo8ED0xLo0
Quote:
Originally Posted by Quick2000
haha nice vid . Yeah, definitely pops a lot but I got the car to run smooth now, just can't quite get the pedal to the floor. Faster than it was before (w/o wot ) Now I just need a little fine tuning in my design.
lol. mine popped and was kinda grumbly most of the time. i miss driving it soo much. the induction noises were soo nice. but it will be better when i finish it. i know a few people saw mine actually spit a flame or two out the exhaust during some... umm.. spirited runs with friends.
the only other way to truely run a 3in without a standalone on a maf'd toyota is some form of signal modification to the maf sensor signal wire. the best is by using a piggy back device like the power enterprise camcon (which also does vvti) or the more crude apexi safc/2/neo.
URD primarily specializes in Tacomas, but I know the guy who owns it and they set me up with one of these for my 2002 Rolla.
Even with my stock piping it runs a lot smoother and has a little more oomph on the upper end. And it is not so quick to downshift (I have an Automatic) when I'll pulling a hill.
try this, have the maf mounted as close to the tb as possiable with the piping around 2.5in everything in front of the maf have it 3in. just make it taper to increase velocity before entering the manifold.
lol. mine popped and was kinda grumbly most of the time. i miss driving it soo much. the induction noises were soo nice. but it will be better when i finish it. i know a few people saw mine actually spit a flame or two out the exhaust during some... umm.. spirited runs with friends.
We do that on the older toyota V6's moving the AFM closer actually directly connecting it in some cases to the throttle body. throttle response is insane. and i'd imagine my car would shoot flames if it was decatted, and had a aftermarket header.
URD primarily specializes in Tacomas, but I know the guy who owns it and they set me up with one of these for my 2002 Rolla.
Even with my stock piping it runs a lot smoother and has a little more oomph on the upper end. And it is not so quick to downshift (I have an Automatic) when I'll pulling a hill.
hmm. interesting. have you played with the software your self? this might be something i pick up here in a little bit. really wouldnt mind getting my hands on one to play with first.
Bdub, insane throttle response would be a silvertop 20v on megasquirt running open stacks. touch the gas pedal, even just lightly and you will send the engine searing towards its 8500 limiter. my buddy has one swapped into his 89 MR2. it is soo fun to drive. but its sound... OMG... no words can describe the bliss that bellows out from that engine bay.
hmm. interesting. have you played with the software your self? this might be something i pick up here in a little bit. really wouldnt mind getting my hands on one to play with first.
Bdub, insane throttle response would be a silvertop 20v on megasquirt running open stacks. touch the gas pedal, even just lightly and you will send the engine searing towards its 8500 limiter. my buddy has one swapped into his 89 MR2. it is soo fun to drive. but its sound... OMG... no words can describe the bliss that bellows out from that engine bay.
touche sir though i'd hope that MR2 has a 6spd behind it to make the most of that setup..
hmm. interesting. have you played with the software your self? this might be something i pick up here in a little bit. really wouldnt mind getting my hands on one to play with first.
No, I haven't played with the SW. Actually, my buddy met up with me one afternoon and he tuned it for me on the fly.
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I'll be sure to post a video of how this thing sounds and what not when I'm finished.
. Yeah, definitely pops a lot but I got the car to run smooth now, just can't quite get the pedal to the floor. Faster than it was before (w/o wot 
) Now I just need a little fine tuning in my design.
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